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Message-Id: <20230927181214.129346-12-miquel.raynal@bootlin.com>
Date: Wed, 27 Sep 2023 20:12:14 +0200
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Alexander Aring <alex.aring@...il.com>,
Stefan Schmidt <stefan@...enfreihafen.org>,
linux-wpan@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Eric Dumazet <edumazet@...gle.com>,
netdev@...r.kernel.org,
David Girault <david.girault@...vo.com>,
Romuald Despres <romuald.despres@...vo.com>,
Frederic Blain <frederic.blain@...vo.com>,
Nicolas Schodet <nico@...fr.eu.org>,
Guilhem Imberton <guilhem.imberton@...vo.com>,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
Miquel Raynal <miquel.raynal@...tlin.com>
Subject: [PATCH wpan-next v5 11/11] ieee802154: Give the user the association list
Upon request, we must be able to provide to the user the list of
associations currently in place. Let's add a new netlink command and
attribute for this purpose.
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
---
include/net/nl802154.h | 18 ++++++-
net/ieee802154/nl802154.c | 103 +++++++++++++++++++++++++++++++++++++-
2 files changed, 117 insertions(+), 4 deletions(-)
diff --git a/include/net/nl802154.h b/include/net/nl802154.h
index 8b26faae49e8..4c752f799957 100644
--- a/include/net/nl802154.h
+++ b/include/net/nl802154.h
@@ -81,6 +81,7 @@ enum nl802154_commands {
NL802154_CMD_ASSOCIATE,
NL802154_CMD_DISASSOCIATE,
NL802154_CMD_SET_MAX_ASSOCIATIONS,
+ NL802154_CMD_LIST_ASSOCIATIONS,
/* add new commands above here */
@@ -151,6 +152,7 @@ enum nl802154_attrs {
NL802154_ATTR_SCAN_DONE_REASON,
NL802154_ATTR_BEACON_INTERVAL,
NL802154_ATTR_MAX_ASSOCIATIONS,
+ NL802154_ATTR_PEER,
/* add attributes here, update the policy in nl802154.c */
@@ -389,8 +391,6 @@ enum nl802154_supported_bool_states {
NL802154_SUPPORTED_BOOL_MAX = __NL802154_SUPPORTED_BOOL_AFTER_LAST - 1
};
-#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
-
enum nl802154_dev_addr_modes {
NL802154_DEV_ADDR_NONE,
__NL802154_DEV_ADDR_INVALID,
@@ -410,12 +410,26 @@ enum nl802154_dev_addr_attrs {
NL802154_DEV_ADDR_ATTR_SHORT,
NL802154_DEV_ADDR_ATTR_EXTENDED,
NL802154_DEV_ADDR_ATTR_PAD,
+ NL802154_DEV_ADDR_ATTR_PEER_TYPE,
/* keep last */
__NL802154_DEV_ADDR_ATTR_AFTER_LAST,
NL802154_DEV_ADDR_ATTR_MAX = __NL802154_DEV_ADDR_ATTR_AFTER_LAST - 1
};
+enum nl802154_peer_type {
+ NL802154_PEER_TYPE_UNSPEC,
+
+ NL802154_PEER_TYPE_PARENT,
+ NL802154_PEER_TYPE_CHILD,
+
+ /* keep last */
+ __NL802154_PEER_TYPE_AFTER_LAST,
+ NL802154_PEER_TYPE_MAX = __NL802154_PEER_TYPE_AFTER_LAST - 1
+};
+
+#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
+
enum nl802154_key_id_modes {
NL802154_KEY_ID_MODE_IMPLICIT,
NL802154_KEY_ID_MODE_INDEX,
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index e16e57fc34d0..e4d290d0e0a0 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -235,6 +235,7 @@ static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = {
[NL802154_ATTR_BEACON_INTERVAL] =
NLA_POLICY_MAX(NLA_U8, IEEE802154_ACTIVE_SCAN_DURATION),
[NL802154_ATTR_MAX_ASSOCIATIONS] = { .type = NLA_U32 },
+ [NL802154_ATTR_PEER] = { .type = NLA_NESTED },
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
[NL802154_ATTR_SEC_ENABLED] = { .type = NLA_U8, },
@@ -249,7 +250,6 @@ static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = {
#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
};
-#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
static int
nl802154_prepare_wpan_dev_dump(struct sk_buff *skb,
struct netlink_callback *cb,
@@ -308,7 +308,6 @@ nl802154_finish_wpan_dev_dump(struct cfg802154_registered_device *rdev)
{
rtnl_unlock();
}
-#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
/* message building helper */
static inline void *nl802154hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
@@ -1717,6 +1716,101 @@ static int nl802154_set_max_associations(struct sk_buff *skb, struct genl_info *
return 0;
}
+static int nl802154_send_peer_info(struct sk_buff *msg,
+ struct netlink_callback *cb,
+ u32 seq, int flags,
+ struct cfg802154_registered_device *rdev,
+ struct wpan_dev *wpan_dev,
+ struct ieee802154_pan_device *peer,
+ enum nl802154_peer_type type)
+{
+ struct nlattr *nla;
+ void *hdr;
+
+ ASSERT_RTNL();
+
+ hdr = nl802154hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
+ NL802154_CMD_LIST_ASSOCIATIONS);
+ if (!hdr)
+ return -ENOBUFS;
+
+ genl_dump_check_consistent(cb, hdr);
+
+ nla = nla_nest_start_noflag(msg, NL802154_ATTR_PEER);
+ if (!nla)
+ goto nla_put_failure;
+
+ if (nla_put_u8(msg, NL802154_DEV_ADDR_ATTR_PEER_TYPE, type))
+ goto nla_put_failure;
+
+ if (nla_put_u8(msg, NL802154_DEV_ADDR_ATTR_MODE, peer->mode))
+ goto nla_put_failure;
+
+ if (nla_put(msg, NL802154_DEV_ADDR_ATTR_SHORT,
+ IEEE802154_SHORT_ADDR_LEN, &peer->short_addr))
+ goto nla_put_failure;
+
+ if (nla_put(msg, NL802154_DEV_ADDR_ATTR_EXTENDED,
+ IEEE802154_EXTENDED_ADDR_LEN, &peer->extended_addr))
+ goto nla_put_failure;
+
+ nla_nest_end(msg, nla);
+
+ genlmsg_end(msg, hdr);
+
+ return 0;
+
+ nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ return -EMSGSIZE;
+}
+
+static int nl802154_list_associations(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ struct cfg802154_registered_device *rdev;
+ struct ieee802154_pan_device *child;
+ struct wpan_dev *wpan_dev;
+ int err;
+
+ err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
+ if (err)
+ return err;
+
+ mutex_lock(&wpan_dev->association_lock);
+
+ if (cb->args[2])
+ goto out;
+
+ if (wpan_dev->parent) {
+ err = nl802154_send_peer_info(skb, cb, cb->nlh->nlmsg_seq,
+ NLM_F_MULTI, rdev, wpan_dev,
+ wpan_dev->parent,
+ NL802154_PEER_TYPE_PARENT);
+ if (err < 0)
+ goto out_err;
+ }
+
+ list_for_each_entry(child, &wpan_dev->children, node) {
+ err = nl802154_send_peer_info(skb, cb, cb->nlh->nlmsg_seq,
+ NLM_F_MULTI, rdev, wpan_dev,
+ child,
+ NL802154_PEER_TYPE_CHILD);
+ if (err < 0)
+ goto out_err;
+ }
+
+ cb->args[2] = 1;
+out:
+ err = skb->len;
+out_err:
+ mutex_unlock(&wpan_dev->association_lock);
+
+ nl802154_finish_wpan_dev_dump(rdev);
+
+ return err;
+}
+
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
static const struct nla_policy nl802154_dev_addr_policy[NL802154_DEV_ADDR_ATTR_MAX + 1] = {
[NL802154_DEV_ADDR_ATTR_PAN_ID] = { .type = NLA_U16 },
@@ -2861,6 +2955,11 @@ static const struct genl_ops nl802154_ops[] = {
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
+ {
+ .cmd = NL802154_CMD_LIST_ASSOCIATIONS,
+ .dumpit = nl802154_list_associations,
+ /* can be retrieved by unprivileged users */
+ },
#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
{
.cmd = NL802154_CMD_SET_SEC_PARAMS,
--
2.34.1
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